BIODEGRADATION AND BIOTRANSFORMATION OF GROUNDWATER POLLUTANT MIXTURES BY MYCOBACTERIUM-VACCAE
BIODEGRADATION AND BIOTRANSFORMATION OF GROUNDWATER POLLUTANT MIXTURES BY MYCOBACTERIUM-VACCAE
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DOI：
10.1128/aem.59.4.1025-1029.1993
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发表时间：
1993-04-01
影响因子：
4.4
通讯作者：
PERRY, JJ
中科院分区：
文献类型：
--
作者：
BURBACK, BL;PERRY, JJ
母牛分枝杆菌可以分解一些主要的地下水污染物。当单独加入时，丙酮、环己烷、苯乙烯、苯、乙苯、丙苯、二恶烷和1,2-二氯乙烯可以被母牛分枝杆菌分解代谢。许多这些化学物质的分解代谢被气相色谱分析监测。气相色谱分析表明，苯的降解产物为苯酚和对苯二酚。氯苯和乙苯的降解产物为4-氯苯酚和4-乙基苯酚。还研究了某些化合物作为混合物存在时分解代谢的程度。当甲苯和苯同时存在时，甲苯被分解代谢，苯的氧化被延迟。虽然甲苯促进了苯乙烯的降解，但当苯乙烯存在时，甲苯的降解率较低。4-氯酚和4-乙基酚对母牛分枝杆菌降解其他芳香族化合物的能力均有拮抗作用。对[C-14]苯的研究表明母牛分枝杆菌可以矿化少量的这种化合物。这些结果表明，混合物中的成分可能对其他污染物的生物降解率产生积极或消极的影响。
Mycobacterium vaccae can catabolize a number of major groundwater pollutants. When added singly, acetone, cyclohexane, styrene, benzene, ethylbenzene, propylbenzene, dioxane, and 1,2-dichloroethylene can be catabolized by M. vaccae. Catabolism of a number of these chemicals was monitored by gas-chromatographic analysis. Gas-chromatographic analysis indicated that the products of benzene degradation are phenol and hydroquinone. The products of chlorobenzene and ethylbenzene degradation are 4-chlorophenol and 4-ethylphenol. The extent that some compounds were catabolized when present as mixtures was also investigated. When toluene and benzene were present concomitantly, toluene was catabolized and benzene oxidation was delayed. Although toluene promoted the degradation of styrene, a lower rate of toluene degradation occurred when styrene was present. Both 4-chlorophenol and 4-ethylphenol had an antagonistic effect on the ability of M. vaccae to degrade other aromatic compounds. Studies with [C-14]benzene indicated that M. vaccae can mineralize small amounts of this compound. These results suggest that components in mixtures may have a positive or a negative effect on the rates of biodegradation of other pollutants.